It seems Batman: Arkham City will not use Games for Windows LIVE, after all, as GreenManGaming tweets: "We've just received notice from Warner's that Batman is Games for Windows but NOT a Games for Windows 'Live' title!" The box art for the stealth/action sequel was revealed in June showing the GFWL logo, suggesting the game would use Microsoft's service, like Batman: Arkham Asylum did. Thanks Eurogamer.